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Chemical Engineering - Chemical Engineering Thermodynamics

Exercise : Chemical Engineering Thermodynamics - Section 1
46.
The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of __________ and COP are the same.
kinematic viscosity
work
temperature
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of sustance added for an infinitesimal addition at constant temperature and pressure. It is given by
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
In jet refrigerators, the refrigerating fluid is practically always
water
ammonia
freon
brine
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Water on heating from 1 to 4°C
contracts
expands
has same volume
may contract or expand
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
Pick out the correct statement.
Compression ratio of an Otto engine is comparatively higher than a diesel engine.
Efficiency of an Otto engine is higher than that of a diesel engine for the same compression ratio.
Otto engine efficiency decreases with the rise in compression ratio, due to decrease in work produced per quantity of heat.
Diesel engine normally operates at lower compression ratio than an Otto engine for an equal output of work.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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